Utility knife



FIG. 1 is a perspective view of a utility knife showing my new design;

FIG. 2 is a left side elevation view;

FIG. 3 is a right side elevation view;

FIG. 4 is a front elevation view;

FIG. 5 is a rear elevation view of the invention;

FIG. 6 is a top plan view; and,

FIG. 7 is a bottom plan view of the invention.

The ornamental design for a utility knife, as shown and described.